ruler

Abstract

This item is a ruler primarily used by children, students, and pupils during their studies. It is transparent and has a roughly right-angled triangular shape. One specific side of the ruler features scale lines and numerical values ​​indicating length. Three scale lines extend approximately perpendicular to the aforementioned side, forming a cross-sectional scale line that touches the opposite straight line. The cross-sectional scale line tightens the overall design of the ruler, creating a sense of unity. The cross-sectional scale line of this item has the advantage of making it easy to draw a straight line parallel to another straight line. As shown in the reference diagram illustrating the usage, by following these steps—(1) aligning the cross-sectional scale line of this item with a straight line, (2) positioning a general ruler perpendicular to the scale of this item, and (3) drawing a straight line with the ruler—it is possible to easily and accurately draw a straight line parallel to another straight line.

Images